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Due to limited pin resources in a microcontroller/microprocessor, controlling an LCD panel could be tedious. Serial to Parallel adapters such as the I2C serial interface adapter module with PCF8574 chip makes the work easy with just two pins. The serial interface adapter can be connected to a 16×2 LCD and provides two signal output pins (SDA and SCL) which can be used to communicate with an MCU/MPU.
This section mentions some of the features and specifications of the I2C Serial Interface Adapter Module.
|Pin Name||Pin Type||Pin Description|
|SDA||I2C Data||Serial Data|
|SCL||I2C Clock||Serial Clock|
|A0||Jumper||I2C Address Selection 1|
|A1||Jumper||I2C Address Selection 2|
|A2||Jumper||I2C Address Selection 3|
|Backlight||Jumper||Control Backlight of panel|